<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<html lang="zh-CN">
	<head>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
		
		<link rel="stylesheet" type="text/css" href="${pageContext.request.contextPath}/static/bootstrap4/css/bootstrap.min.css"/>
		<script src="${pageContext.request.contextPath}/static/bootstrap4/js/jquery-3.5.1.js" type="text/javascript" charset="utf-8"></script><strong></strong>
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		<title>头部</title>
		<style>
			*{

		    padding:0px;
		    margin:0px;

		  }
			
      
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	<body>
		<nav class="navbar navbar-expand-lg navbar-light bg-info">
		  <a class="navbar-brand" href="#">欢迎使用设备管理系统</a>
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